schroeder



1,614,692 Jan- 18' 1927' o. c. scHRoEDER JUMP SPARK IGNITER FOR OIL BURNERS. ETC

Filed March 11. 1925 i. Sheets-Sheet 2 T/PHNsmRME/P BOI/ER MOTO/P CONTROL BURNER MOTOR i Patented Jan. 18, 1927.

Aferred form,

UNITEDy STATES 1,614,692 PATENT OFFICE.

OSCAR C. SCHROEDER, 0F CHICAGO, ILLINOIS.

JUMP-SPARK IGNITER FOB OIL BUBNBS, ETC.

' Application filed `March J1, 1925. Serial No. 14,842.

it can bereadily removed and replaced in.

case it should be deemed advisable.

To illustrate my invention, I annex hereto two sheets of drawings, in which the same reference characters are used to designate identical parts in -all the figures, of'whioh,-

Fig. 1 is a front elevation, partly in section, of my novel jump spark igniter installed in a. furnace, the furnace and its associete-d parts being indicated in dotted lines, while my igniter is shown in full lines;

Fig. 2 is a top plan view of the igniter as seen on the line 2-2 of Fig. 1, but on a larger scale; and

Fi 3 is a diagram illustrating the electrica connections by which the igniter is operated.

While I might use m igniter in connection with any form o a burner, I lhave shown it as installed in connection with the burner shown in my issued August 19, 1924, and it will be readily understood from the drawings that rcpresents the firepot of a furnace, and that the burner is provided with the rotating cup 11 from which the oil is sprayed out by 'cen trifugal action, forming a ring of flame in the bottom of the repot. The oil for the rotating burner is supplied through thereservoir 12, it being supported by the casting 13 from the legs 14, w 1ch also support the upper casting 15 which supports the upper portion of the burner proper. 16 indicates the transformer, where alternating current is used, and the wires 17 and 18 lead from the transformer to the igniter, as will be described.

In carryin out my invention in its preform a enerally rectangular main frame, the sides o which are composed of two rods 20 made of any desired insulating material, which are set in aperturesi the base piece 21, preferably of metal, and

Patent No. 1,505,607,

secured therein by screws 22. Mounted in .the recess 23 formed in the lug 24 constitutmg a part of the base piece 21, is the springpressed plunger 25, the rounded bottom of which co-operates with the shallow recess 26 formed in the top of the rod 27 adjustably mounted in the base 13 of the frameworkvand secured by the set screw 28 in any desired position. The u per ends of the insulating rods20 are re uced so as to form the lugs 29, which are adapted to enter the recesses 30 formed on theunder side of the frame 15. It will be understood that when it is desired to insert the igniter, the lu 29 will be placed in the recesses 30, and t e lower end swung over into place, the springpressed plunger 25 giving so as to allow lits rounded lower end to enter and be retained in the recess 26.

The igniter is formed with two adjustable electrodes, the outer one consisting of the wlre or rod 31, which is of the shape shown, and has its ends secured in the cross piece 32, which is of the shape best shown in Fig. 2, and has the large central aperture 33 therein topermit the passage of the other electrode 34 therethrough and give plenty of clearance so that there can be no sparking between the cross piece and the electrode 34. The cross piece 32 is secured in an desired adjustment by the screws 35 threadedr through the ends thereof and engaging the posts 20. The wire 17 y leads to the binding post 36 of the electrode 31. The electrode 34 is pref erably formed of a heavy rod, as compared with the electrode 31, and the upper end 'of the same is reduced to form the electrode proper 37, which is preferabl of the same diameter as the electrode 31. be wire 1 8v is' connected to the bottom of the rod or electrode 34, which is constructed as a bin post. This electrode is rigidly secured in the cross piece 38, which 1s vertically ad j ustable on the rods 2Q, and is secured in any desired adjustment by the set screws 39 threaded through the ends thereof and engagin the posts 20.

Wit the foregoing construction, it will be obviousthatl have formed a. strong and durable igniter, with operating surfaces that can be adjusted to and from each otherl as may be desired, and it will likewise be obvious that the same can be readily removed from the furnace when it is desired to clean orl re lace it.

In Fig. 3, have illustrated the preferred wiring for the same, and the arrangement will be readily understood from the means attached to the various elements in the circuit. This is illustrated as arranged for an alternating current with a transformer to step up the potential to that necessary for the jump spark igniter, and it will be understood that where only direct current is available, a magneto will be substituted for the transformer to secure the desired potential.

Vhile I have shown and described my invention in the form which I at present con- Sider best adapted to carry out its purposes, it will be understood that it is capable of some modification, and that I do notl desire to be limited in the interpretation of the following claims except as may be necessitatedby the state of the prior art.

What I claim as new, and desire to secure by Letters Patent of the United States, is:

1. In a furnace, the combination with a framework having a pair of opposed recesses, of a jump spark igniter having a supporting frame with a lug atone end to co-operate with one of the recesses, and at the other end a spring-pressed plunger to co-operate with the other recess, the igniter including two electrodes adjustable on the frame, substantially as described.

2. In a furnace, the combination with a framework having a pair of opposed recesses, of a jump spark igniter having a supporting frame with a lug at one end to co-operate with one of the recesses, and a spring-pressed plunger at the other end to co-operate with the other recess, the jump spark igniter including two cross pieces adjustable on the frame, each of said cross pieces carrying an electrode.

3. In a jump spark igniter, the combination with a pair of insulating posts, of a base piece connecting one end of the posts, a cross piece adjustable on the central portion of the posts` and carrying an elongated electrode, and a second cross piece adjustable towards the ends of the posts and having an aperture therethrough for the iirstmentioned electrode and an electrode carried by the second cross piece approaching at its end the adjacent end of the other electrode.

4. In a jump spark igniter, the combination with a pair of insulating posts, of a base piecev connecting one end of the posts, a cross piece adjustable on the central portion of the posts and carrying an elongated electrode, and a second cross piece adjustable toward the ends of the posts and having an aperture therethrough for the first-mentioned electrode and an electrode carried by the second cross piece and of a general U- shape and approaching at its end the adjacent end of the other electrode.

5. In a jump spark igniter, the combination with a pair of insulating posts, of a base piece connecting one end of the posts, a cross piece adjustable on the central portion of the posts and carrying an elongated electrode consisting of a heavy rod with its electrode end reduced, and a second cross piece adjustable toward the ends of the posts and having an aperture therethrough for the iirst-mentioned electrode and a generally U-shaped electrode carried by the second cross piece but with its end adjacent the reduced end brought close to said reduced end.

In witness whereof, I have hereunto set mv hand this 9th day of March, 1924. u

OSCAR C. SCHROEDER. 

